The raw materials for factor production mainly come from coal, and the relationship between coal and urea is. The content of coal accounts for 70% of the cost of urea, including raw material cost and energy cost, so the relationship between urea and coal.
Urea, also known as formamide, is an organic compound composed of carbon, nitrogen, oxygen and hydrogen. This is a white crystal. One of the simplest organic compounds is the main nitrogen-containing end product of protein metabolism in mammals and some fish. It is also the highest nitrogen fertilizer at present. Crystalline urea is a white needle-like or prismatic crystal, which has strong hygroscopicity and caking after hygroscopicity, and its hygroscopic speed is 12 times faster than that of granular urea.
Brief introduction of urea
As a neutral fertilizer, urea is suitable for all kinds of soils and plants. Easy storage, convenient use and little damage to soil. It is a chemical nitrogen fertilizer with a large amount of use at present. Urea is synthesized from ammonia and carbon dioxide in industry under certain conditions. Urea is easily soluble in water, and 105g is soluble in 100 ml water at 20℃, and the aqueous solution is neutral.
There are two kinds of urea products. Granular urea is translucent, with a particle size of 1 ~ 2 mm, smooth in appearance and obviously improved in hygroscopicity. At 20℃, the critical moisture absorption point is 80% of the relative humidity, but at 30℃, it drops to 72.5%. Therefore, urea should be avoided to be stored in the open air in humid climate in midsummer. After adding hydrophobic substances such as paraffin wax in urea production, its hygroscopicity is greatly reduced.